Automatic drilling-machine.



F.. H. PIERPONT.

AUTOMATIC DRILLING MACHINE.

APPLICATION FILED MAR.16, 1906.

Patented June 28, 1910.

8 SHEETS-SHEET 1.

@wanton P. H. PIERPONT.

AUTOMATIC DRILLING MACHINE.

APPLICATION FILED MAR. 16, 1906.

Patented June 28, 1910;

B SHEETS-SHEET 2.

ANDREW a GRAHAM cc Fuoouewcmwnins, wAemNGw-m n c F. H. PIERPONT.

AUTOMATIC DMLLING MACHINE. APPLICATION PI'IED MAB.. 16, 1906.

Patented June 28, 1910.

8 SHEETS-SHEET 3.

wi kwamen F. H. PIERPONT. AUTOMATIC DRILLING MACHINE.

APPLICATION FILED MAR.16, 1906.

Patented June 28, 1910.

8 SHEETS-SHEET 4.

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Patented June 28, 1910.

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P. H. PIERPONT.

AUTOMATIC DRILLING MACHINE.

APPLIOATION FILED MAB.. 16, 1906.

Patented June 28, 1910.

8 SHEETS-SHEET 6.

P. H. PIERPONT,

AUTOMATIC DRILLING MACHINE.

APPLICATION FILED MAR. 16, 1906.

Patented June 28, 1910.

8 SHEETS-SHEET 7.

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wi hmmm 3%May ANDREW P. GRAHAM cu.. FNOTLm-IOGRAPM. rs. wnsnmmon.

F. H. PIERPONT. AUTOMATIC DRILLING MACHINE.

APPLICATION FILED MAL 16, 1906.

Patented June 28, 1910.

8 SHEETS-SHEBT 8,

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narran srs armar amen FRANK I-IINMAN PIERPONT, OF I-IORLEY, ENGLAND,ASSIGNOR TO LANSTON MONO- TYPE MACHINE COMPANY, OF PHILADELPHIA,PENNSYLVANIA, A CORPORATION OE VIRGINIA.

AUTOMATIC DRILLING'r-MACHINE.

Specicaton of Letters Patent.

Patented June 28, i910.

To all whom it may concern:

Be it known that I, FRANK I-IINMAN PIER- PoN'r, a citizen of the UnitedStates, temporarily residing at Horley, Surrey, England, have inventedcertain new and useful Improvements in Automatic Drilling- Machines; andI do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming a part of this specification, and to the figures andletters of reference marked thereon.

This invention relates to drilling, gaging and burring machines, and itis chiefly intended for so treating matrices for type casting machines,and particularly those of the well known monotype machines in whichconnection it will be described.

The matrices employed in the monotype casting machines comprise shortblocks, rectangular in cross section, and having the representation ormolds of the various type or other signs sunk in one of their ends.These matrices are all mounted in a suitable die-case or carrier towhich motion is imarted to bring the required matrix over a mold for thebody of the type or character. In addition to this movement, thematrices are so mounted in their carrier that each can be movedindependently of the other and thus allow the required matrix to bespeedily and accurately centered over the mold cavity by a cone-pinwhich enters a corresponding recess in the opposite end of each matrixto that having the mold of the character. For the purpose of permittingthis individual adjustment of the matrices, they are mounted in rowsupon rods or bars which extend across the matrix carrier and these rodspass through transverse openings in the matrices. The diameter of theopenings is slightly laro'er than that of the rods, permitting justsufficient movement for the centering and adjustment above referred to.

The machine forming the subject of this invention is chiefly designedfor the drilling of the aforesaid transverse openings in the matricesthrough which the rods pass, and from the foregoing description it willbe appreciated that these holes must be formed with extreme precisionand accuracy, and that a matrix when being drilled must be located withextreme exactness; further, the edges of the holes must be smooth, sinceany bur or fin will interfere with the mounting and individualadjustment of the matrices in the die-case. Owing to the accuracy withwhich it is required to operate it is desirable that the matrices shouldall be of exactly the same size, and that any material variation of sizebetween the matrices should be detected or avoided. In addition, sincethe cost of production of these matrices is a serious item it isdesirable that the machine be self acting or automatic, and that itperform the various operations speedily as well as accurately. Thesefeatures and points are all recognized and provided for by the presentinvention, according to which the matrices are automatically fed,preferably one by one, from a galley into a channel wherein moves areciprocating plunger. rlhis plunger delivers the matrices one at a timeinto a gaging and holding carrier or slide, that is to say, a carrierwhich moves in a guide or bearing in which it is a close fit andreceives and transfers the matrix to the drilling position, the feedingplunger terminating its feed movement at a predetermined point relativeto the slide. The block or matrix so held is then operated upon by twodrills acting simultaneously or successively from its opposite sides andafter being drilled the carrier is brought back to first position andthe matrix is ejected therefrom by the next matrix advanced by the feedplunger. The drilled matrix is then passed to or toward the burringtools by the succeeding matrix or matrices.

The matrix receiving cavity in the slide or carrier is only suflicientto receive the matrix `so that the latter is accurately presented to thedrills, and while being drilled is securely held against displacement inany direction.

rlhe drills are situated at a diiferent level from or in a plane to oneside of the matrix channel from which the carrier receives the matrices.The matrix channel, in the machine illustrated, is horizontal and abovethe axes of the drills and the matrix slide or carrier moves vertically,first to present the matrix to the drills and then to, return it to thematrix channel, whence it is pass-ed on to the burring tools. By thegaging mechanism thus provided, should a matrix of wrong length happento get into the machine, it is prevented from being drilled, since theslide or carrier being a close fit in its guide and the matrix feedingpusher terliO minating its feed movement. at a constant distance fromthe slide or carrier, a short or a long block succeeding one of normallength, will project or cause a companion to project from the carrierand interlock it with the guide. These abnormal articles will thusautomatically lock the matrix carrier and prevent it from shifting tothe drilling position, and will, therefore, pass through the machineYand be ejected, undrilled, at the delivery side thereof where they canreadily be detected.

The machine is so contrived that the failure of the slide or carrier todescend does not, as will hereafter be fully described, interfere withthe operation of the machine, nor cause injury to any of the parts.

After a matrix has been ejected from its carrier bythe entry therein ofanother matrix, it is pushed along the matrix channel into positionbetween two opposed burring tools which smooth down the edges of theopening formed by the drills. The matrix is then passed to the end ofthe matrix channel, and finally discharged by a horizontallyreciprocating plunger, into a receiving galley.

The drills are preferably positively driven, and the burring tools aredriven from and advanced with the drills the movement of their spindlesbeing limited, so that the tools only remove a definite portion of theedge of the hole.

Referring now to the accompanying drawings wherein is shown a preferredform of embodiment of the invention as adapted to treat matrices for themonotype machines, Figure 1 is a front elevation of the machine. Fig. 2is a sectional plan taken in the plane of the burring tools. Fig. 3 isan end view looking from the left hand side of Fig. 1. Fig. i is atransverse sectional elevation on the line 1-4 of Fig. l and showing thefeed plunger in position to admit a matrix to the matrix channel. Fig. 5is a similar view to Fig. 4, the feed plunger being at the opposite endof its normal stroke, having just inserted a matrix into the matrixcarrier or vertical slide. Fig. 6 is a sectional elevation on the line6-6 of Fig. 5 showing the carrier actuating mechanism. Figs. 7 and 8 aresectional detail views of part of the carrier actuating mechanism. Fig.9 is a sectional elevation showing a delivery plunger which passes thematrices from the matrix channel into the receiving galley after theyhave been drilled and burred. Fig. 10 is a side elevation of themechanism shown in Fig. 9. Figs. 11, 12 and 18 are transverse sectionalelevations showing the operation of the feed plunger for clearing themachine of matrices at the end of the work. Fig. 14 is a transversesectional elevation of the machine showing a preferred arrangement ofcompressed air conduit by which the machine 'is kept clear of chips orother foreign matter. Figs. 15, 16 andv 17, show details of thecompressed air conduits, and Fig. 18 is a sectional elevation on anenlarged scale of one of the matrices treated by the machine.

rThe same characters designate corresponding parts in the severalfigures.

A A are the drills; B, the burring tools; C, the gaging carrier; D thefeed plunger;

E, the delivery plunger; F the feedgalley;

and G the receiving or delivery galley.

According to the present embodiment of the invention the drills A A aremounted in spindles A2 which are carried in bearings h It in uprights HH2 of the machine frame H. These spindles are each rotated by a. beltpulley A3 and are free to slide longitudinally in their bearings.

Bearing on the outer ends of the drill spindles are arms J pivoted tothe machine frame at h2 and carrying at their other ends rollers jagainst which rotating cams K K bear, the cam K engaging the lever Jwhich acts on the spindle of the drill A and cam K engaging the lever Jfor the spindle of the drill A by which means the drills are I fedforward at the proper time. Both cams K and K are provided with parts k,Fig. 9, by which the drills A A are fed forward so that each drill cutspreferably through half the thickness of the matrix. A single drillmight be used for the purpose, but yas this would entail the formationof a large bur or fin at one side of the matrix and a contraction ofpresure on one side, it is preferred to employ two drills whereby theseobjections are avoided and. the hole more speedily cut. But, if eachdrill were to be withdrawn after it has penetrated approximately halfwaythrough the matrix, a fin or shoulder would be left in the opening wherethe two cuts met, this is obviated by causing one drill, for example,A', to be withdrawn after cutting approximately half-way through thematrix, and causing the drill A to follow on until it has passed clearthrough the matrix, by which means a straight and even opening is cutclean and accurately through the matrix. In order that this operationmay be performed the cam K from which the drill A is operated has, inaddition to the part la similar to thevcam K', an additional raised partc, (see Figs. 9 and 10) to push the drill clear through the matrix afteror during the Withdrawal of the drill A and this latter portion of the`tools travel can be performed more rapidly than the cutting part. Thedrills are each withdrawn, after their respective cut or travel iscompleted, by a spring A4 interposed between the pulley A3 and thebearing k.

lVhile being drilled the matrix is supported and held accurately inposition-by the gaging carrier C. The gaging matrix carrier C is hererepresented in the form of a vertically reciprocating slide accuratelyfitted between parallel guiding surfaces on the frame and provided witha transverse opening or chamber C of such form and dimensions that amatrix of proper `proportions will exactly fill it. This matrixreceiving cavity or chamber C is preferably formed wholly within thebody of the slide (rather than in one side thereof) its length andcross-section corresponding with those of the matrix, so that when thelatter is presented in drilling position it will be inclosed and held onall sides by hardened steel walls, except at the points where the drillsengage where the sides of the slide are perforated, forming gages toreceive and accurately position said drills as they are advanced to cutthe matrix.

After the opening 2 (see Fig. 18) is drilled in a matrix l, the carrierC is shifted to bring its chamber C into alinement with the matrixchannel L and the matrix is ejected from the carrier by the advance ofthe next undrilled matrix which is now fed forward by the feed plungerD.

On being ejected from the carrier C the drilled matrix is caughtbetweentwo springcontrolled stop-pins L, which project slightly into the matrixchannel L and enter the opening 2 in the matrix as shown in Fig. Q.These pins represent blank detaining means operating to retard thedelivery of the blank from the carrier and insure its position, as whena short blank is delivered to the carrier and the displaced blank isrelied upon to arrest the carrier, said pins also operating to prevent amatrix being pushed too far along the channel L and into the path of theburring tools B, which latter, when advanced, would not enter fairly, ifat all, into the opening 2 of the matrix. Cn another matrix beingejected from the carrier C it pushes the matrix engaged by the pins Lfrom between these pins into position between the burring tools B. Thesetools are each mounted upon a rotating and longitudinally movablespindle B carried in bearings h2 and each provided at its outer end witha conical friction surface B2 arranged to receive motion fromcorresponding friction cones A on the drill spindles A2. These cones Axin addition to rotating the spindles B press them forward when thedrills are fed forward, so that when a matrix is presented in front ofthe burring tools the latter are simultaneously advanced, and rotated,to smooth down the edges of the openings 2, as at 3, Fig. 18. Since thedrill A is fed forward through a greater distance than the drill Aprovision has to be made to prevent the burring tool B which is rotatedfrom the spindle of the drill A from being fed forward too far. This isaccomplished by setting back the cone A on the spindle of the drille Aso that the latter advances a greater distance than the cone on thespindle of the drill A before this cone AX engages its particular coneB2, thus causing both burring tools to advance through equal distances.The burring tools B are returned after each operation by springs B3disposed between the bearings h2 and the cones B2. The ends B4 of thespindles of the burring tools are adapted to come against the walls ofthe matrix channel and act as stops or gages to prevent the tools beingfed forward too far. Any further advancement of the drilling spindlescarries forward the friction cones on the burring tool spindles whichare free to slide against the action of the springs B3, interposedbetween the spindles proper and the tubular sections carrying the conesB2 said tubular sections being splined to the spindle so as to permitlongitudinal play.

The matrices l to be dealt with are placed side by side in the feedgalley F at the front of the machine. This galley is detachably securedto an arm H3 of the machine so that it can readily be removed forrefilling. A follower F is provided and is connected by a cord f to aweight F2 passing over a pulley L3 so that the follower is constantlytending to feed the matrices into the matrix channel L with which theend of the feed galley communicates and in which operates the feedplunger D.

When the feed plunger D is in the position shown in Figs. l, 3 and 4,its end is withdrawn beyond the end of the column of matrices in thefeed galley and the first matrix is caused, by the follower F actingunder the influence of the feed weight F2, to enter the channel L whichis only of sufficient width to accommodate one matrix and to prevent anyside play thereof. The plunger D now advances and moves the matrix inthe channel L endwise along the channel and into the matrix receivingopening C, see Fig. 5, in the vertical slide or carrier C. At the sametime the feed plunger closes the entrance from the feed galley into thematrix channel and prevents other matrices entering.

The motions of the vertical slide or carrier C are so timed that thematrix receiving cavity C therein is in line with the matrix channel Lwhen a matrix is fed forward by the plunger D, after which the carrier Cdescends or is caused to descend carrying a matrix with it to the drillsA A', that is if the matrix which has been fed into the cavity C of theslide is exactly of the proper dimensions. If, however, the matrixthrust into the chamber C is slightly too long, even say Twth part of aninch, then its forward end will project beyond one side of the carrier Cinto the second part or delivery end .of the matrix channel L and thusprevent the descent of the vertical slide C. This matrix is thereforepassed through the machine undrilled, since the failure of the carrierto descend does not interfere with the other movements of the machine;and on another matrix being fed forward, the defective and undrilledmatrix is ejected from the carrier and ultimately delivered to thereceiving galley Gr at the back of the ina/- chine, where its presencecan be detected at a glance when a filled galley is removed from themachine. On the other hand, if a matrix which is say the wth part of aninch short is fed into the chamber C then it will not completely ejectthe previously drilled and normal matrix and the carrier being thusarrested in its upper position, this faulty matrix, like the other ortoo long one, is Aalso passed through the machine into the receivinggalley, undrilled.

Should too short a block enter the machine first it will not prevent thecarrier from descending as above described, since there will be no blockin front of it to engage the carrier; care should therefore be taken toinsure a normal article being inserted first when the machine is startedand for this purpose la blank of known and proper size may be employed.

The feed plunger D is conveniently operated from a cam M on a shaft K2which also carries the cams K'K. rlhis cam which is shown clearly onFigs. 4, 5 and 11, is adapted to bear,`at the proper time, against oneend of an arm D pivoted at h4 to the machine frame. The upper end of thearm D is slotted to receive a pin d on the plunger D and under theaction of the cam M this lever in rocking operates the plunger. The camis cut to allow for a quick return of the lever D which is effected by aspring D2 connected to the lever and to the machine frame. The shaft K2also carries a cam M which operates the vertical slide or carrier C.

The reciprocating motion of carrier G for alternately presenting itsmatrix receiving cavity C opposite matrix channel L and drills A A, isproduced by a cam M engaging a roller 08 on the carrier and acting inconjunction with a retracting spring C5. For convenience the springinstead of being directly connected to the carrier is coupled to a leverC6 pivoted at h5 and provided with a headed pin c2 adaptedl to beentered in a keyhole slot or' seat c2 in the carrier.

The outer surface of cam l may be concentric with thev axis of rotationand serve as the gage for positioning the carrier with its matrix cavityin alineinent with the niatrix channel, for inserting and dischargingmatrices; but in such case wear on the cam surface and roller would tendto disturb the proper relation of the parts and interfere with theintroduction of the matrices. To avoid this the carrier is equippedAwith a positioning gage in the form of a trigger or latch C2 pivoted atc2 in position to engage a shoulder on the carrier when the latter hasreached the extreme of its motion, a spring C4 serving to effect andmaintain the engagement of said latch.

The latch is automatically withdrawn at the end of the matrix 'insertingperiod by means of a pin m on cam M arranged to engage the lower orlever end of the latch, and so located with respect thereto and to cam Nthat as the heel of the cam approaches 'roller c the latch Vwill bewithdrawn, allowing said roller to run down the steep portion .of thecam and thus retracting the carrier with a smooth and rapid motion.

The descent or retrograde motion of the carrier is interrupted by asecond gaging device rfor'accurately positioning the matrix cavity Copposite the drills. In the'present instance this gaging function isperformed by a collar or shoulder C7 on the carrier and engaging a seaton the frame. By adjusting the position of the collar in the directionof motion of the carrier, the latter can be stopped with its matrixcavity in proper Y relation to the drills.

By the employment of the two positioning gages for the matrix carriernot only can the feeding and drilling positions of the carrier beaccurately and independently determined, but the necessity for extremeaccuracy in the form of cam i is avoided, the latter serving merely as ameans for translating the carrier from one position to the other, henceit is only important that the cam should be of such form as to insurethe advance of the carrier to or beyond the engaging point of the latch,and, in the latter case, permit a retrograde movement until the latchtakes its bearing.

When a matrix is pushed along to the end of the matrix channel by thesucceeding matrices it is passed into the receiving galley G by thedelivery plunger or pusher E ywhich packs the completed matrices in thisgalley side by side. The plunger E `is operated from a cam N on theshaft K2 (see Figs. 1, 9 and 1Q) and conveniently formed in one with thecam K. On one end of the plunger E is a rod E to which a bell-cranklever E2 E3 is connected. This bell crank lever is pivoted at e and itsfree lower end is arranged to be acted upon by the cam N. The plunger Eis withdrawn and the lower free end of the bell-crank lever E2 E3 iskept in contact with the cam N by means of a spring E2. The upper arm E2of the bell crank lever E2 E3 is in two parts hinged together by a pinE6. The spring E4 is connected to the upper section of arm E2 below itspivot E6 and operates to maintain elastic contact with pin E2, thustending to keep these two portions of the lever in the same relativeposition to each other. If, however, the plunger E is for any reasonprevented from advancing the lower section of the bell crank lever goesthrough its cycle of movements without imparting any motion to the upperextremity E2 of the lever.

The cam shaft K2 is rotated at the proper speed from a driving shaft Othrough a train of gears O O2 O3 and K3 the first and last of which areon the shafts O and K2 respectively. The shaft O carries a V-pulley O4by which it is driven.

The machine, as constructed and described herein performs the followingcycle of operations, and it is to be understood that this cycle may bevaried without departing from the invention.

Assuming the parts to be in the position shown in Figs. 1, 2 and 3, thefeed galley F is filled with undrilled matrices of which it ispreferably adapted to hold about sixty placed side by side. l/Vith thefeed plunger D in its withdrawn position as shown the passage betweenthe feed galley F and matrix channel L is open and a matrix is forcedinto this channel by the feed weight F2 and follower F. On the forwardstroke of the feed plunger D under the action of its cam M, into theposition in which it is shown in Fig. 5, the matrix in the channel ispushed into the matrix-receiving cavity C in the vertical carrier C,which, after receiving this matrix, is unlocked as above described andpermitted to drop on to its cam M and descends carrying the matrixbetween the drills A A. The rotating cams K K now engage the levers Jand move the drills forward to bore the matrix. After the drills haveacted and recede the carrier C is raised by its cam and locked in itsupper position by the latch C2. The plunger D which has meantime beendrawn back to allow another matrix to enter the channel L now advancespushing this new matrix into the cavity C and pushing out the matrixwhich has been drilled and becoming itself exactly located in thecavity. The matrix thus pushed out is caught by the spring controlledstop pins L where it rests until another matrix has been drilled andejected from the carrier C. This last-ejected matrix pushes the oneengaged by the stop pins from between these pins and in between theburring tools B. These burring tools are now advanced by the contact oftheir cones B2 with the cones on the spindles of the drills which arenow advancing to drill a matrix in the carrier C and from which theburring tools receive a rotary motion in addition to the longitudinalfeed. When a matrix has been burred it is pushed clear of the burringtools by the next oncoming matrix and so on until the part of the matrixchannel beyond the burring tools is filled with matrices; in the exampleshown, there are four burred matrices in the channel. When this happensthe delivery pusher is advanced by its cam and pushes the end matrixinto the receiving galley G and so on until the galley is full.

The presence of an undrilled matrix in the receiving galley can readilybe detected since the matrices being placed side by side in the galleythis undrilled matrix will block the hole which otherwise would extendthrough the entire column of matrices.

Should the machine be stopped after the feed plunger has inserted thelast matrix into the cavity in the carrier C there will remain in themachine six matrices, two of which have yet to be burred, which will notbe ejected in the normal working of the machine. In order to get thesematrices out the running of the machine is continued until a stop O5against which the lever D strikes at the end of the forward stroke iswithdrawn and the lever D pulled over by the handle D2 to eject the lastmatrix from the slide, at the same time pushing another matrix betweenthe burring tools and forc ing the matrix at the other end of the colunmin the matrix channel into the path of the delivery plunger E. 0n thereturn stroke of the plunger E another matrix is' allowed to pass intothe path of this plunger and the last matrix in the channel L is placedbetween the burring tools. There now remain in the matrix channel fourmatrices which are caused to pass successively into the path of thepusher E by a spring-controlled catch P pivoted at p to a sliding bar P,see Figs. 4, 5, 11, 12 and 13. lVhen this catch is moved down from theposition shown in Fig. 11 to that shown in Figs. 12 and 13, its nose P2engages with the rear end of the last matrix in the channel L. rThecatch P and bar P can now be pulled longitudinally step by step as shownin Fig. 13 to bring the remaining matrices one by one into the path ofthe plunger E, as this plunger pushes the matrices one at a time intothe receiving galley Gr.

As the accuracy of operation depends to some extent on the matricesfitting closely together and being a fairly close fit in the variouschannels it is desirable that chips or cuttings from the matricesthemselves be prevented from lodging in the channels or between thematrices. For this purpose jets of compressed air are employed to carrythese chips away and are conveniently situated as shown in Figs. 14, 15,16 and 17. A pipe Q controlled by a valve Q is attached to a junctionbox Q2 from which it is distributed to the required points by variousconduits. rlhe drilling tools and matrix carrier opening on each sideare covered by a casing R from which a conduit R extends on one side toconvey away chips and the like and prevent these lodging between thematrices or blocking the machine. A pair of air conveying conduits R2 R3eXtend into this inclosing casing from opposite sides, see Figs. l, Q, 3and 14C. Another conduit Q* opens into the chamber QG so as to deliver acurrent of air between the drills, while a third conduit Q5 delivers airat the burring tools by means of a passage Q7 which is in communicationwith passage Q6 by a cross and downward passage Q8, and also is inconnection with a passage Q9 on the outside of the vertical carrier boXand covered by a plate Ql0 which is for the purpose of blowing a currentof air through the newly drilled hole, after the carrier has risen toits normal height, into the covered space R on the opposite side of theframe.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is

l. In a machine such as described, the combination, to form an automaticblank Vgaging and transfer mechanism, of the following elements, to-wit:a blank carrier including a slide provided with a transverse blankreceiving cavity or holder lopen at opposite ends, gaging members inproximity 'to the ends of the blank receiving cavity or holder betweenwhich "the carrier reciprocates; a blank feeding device terminating itsmotion in one direction at a predetermined distance from the blankcarrier; and actuating devices for the carrier and blank feeder adaptedto permit the motion of the carrier to be suspended by the action of adefective blank while the feeder continues in action and effects theremoval of the obstructing blank.

2. Ina drilling machine such as described, the combination of thefollowinov elements, to-wit: drilling devices; a blank feeder having apredetermined movement; and aV blank gaging and transferring mechanismintermediate the drilling devices and feeder and including areciprocatory carrier movable between gaging devices and provided with ablank receiving cavity or holder.

' 3. In a drilling machine such as described, the combination of thefollowmg elements, to-wit: a pair of alined drills; a blank gaging andtransfer mechanism including spaced gaging devices and a blank carrier,the latter provided with a blank holding cavity; a blank feeding deviceincluding a pusher terminating its motion at a predetermined distancefrom the carrier, and operating to insert successive blanks into thecarrier, and in so doing displace the blank at the time in the carrier;and a pair of burring tools on opposite sides of the line of dischargefrom the carrier in position to engage successive blanks as deliveredtherefrom.

4c. In a machine such as described, the combination with blank feedingdevices,

drilling apparatus and a blank carrier inter-- 5.*In a machinei such asdescribed, pro-Y vided with drilling and burring devices 1n parallelrelation and in combination therewith means for advancing and retractingthe drill, a beveled driving wheel on the drill spindle, a reversedbeveled wheel on the bur spindle, a yielding connection between.

said driven wheel and its spindle, and means for gaging the advance ofthe burspmdle.

6. In an automatic drilling machine such as described, the combinationwith a drilling mechanism, blank feeding mechanism,

and a blank carrying mechanism intermediate the feeder and drill, ofmeans connected with the blank carrier for automatically suspending itsaction upon the presentation of a blank of abnormal length so that suchdefective blank will be withheld from the drill and delivered inundrilled condition.

7 In an automatic drilling machine such as described, the combinationwith drilling mechanism, a blank feeder and an intermediate blankcarrier and holder, of means controlled by blanks in the carrier forautomatically suspending the action of saidrcarrier and preventing thedelivery to the drill of blanks of abnormal dimensions.

8. In a machine such as described, provided with a reciprocating carrierpresenting its blank holder in alinement with Va blank feeder and adrill alternately and successively, means for actuating and gaging thepositions of said carrier comprising in combination with the lattermeans for positively moving the carrier in one direction, means tendingto move the carrier in the opposite direction, a latch for holding thecarrier in one position of adjustment, and a stop for arresting thecarrier in the other position of adjustment when the latch is withdrawn.

9. In a machine such as described, the combination with the carrier, andits advancing cam provided with an abrupt incline or heel, of the latchfor engaging the carrier to hold it in position and the trip moving inunison with the cam and acting on the latch to release the carrier andcause it to engage the abrupt incline during its return motion.

10. In a machine such as described drilling, blank feeding and blankcarrying and holding devices and in combination therewith means foractuating the blank carrier and sustaining it accurately in position forthe insertion and discharge of blanks, the same including an operatingcam and a retaining latch, said cam being constructed to successivelyadvance the carrier and trip the latch.

11. In a machine such as described, the combination of the followingelements, towit: a reciprocatory blank carrier provided with yieldableretracting means and a blank receiving cavity extending transversely ofits line of motion; and gaging devices located to one side of the lineof motion of said carrier in position to engage blanks of abnormaldimensions when seated in said carrier.

12. In a machine such as described, the combination of the followingelements, towit: a reciprocatory carrier provided with a blank receivingcavity open at opposite ends and extending transversely of the path ofmovement of said carrier; actuating devices including means foryieldably propelling the carrier in one direction; and gaging deviceslocated intermediate the opposite extremes of the carriers traverse andin line with the open ends of the blank cavity.

13. In a machine such as described, the combination of the followingelements, towit: a reciprocatory blank carrier provided with atransverse blank cavity open at opposite ends and yieldable actuatingmeans; a blank guide or channel extending transversely of andintersecting the line of travel of said blank carrier and provided witha gap or opening for the passage of the latter; gaging devices locatedto one side of the blank channel in proximity to the open ends of theblank cavity; and a pusher movable longitudinally of the blank channel.

14. In a drilling machine such as described, the combination withdrilling appliances, of a movable blank carrier provided with atransverse seat dimensioned to receive a blank of normal proportionsparallel gaging surfaces between which the carrier moves in bringing thecontained blank to drilling position, and means having a normal tendencyto advance said carrier to drilling position.

15. n a drilling machine such as described, the combination with alongitudinally movable drill, of a blank carrier movable transversely ofthe axis of the drill, to present and hold the blank in drillingposition and withdraw the same therefrom, said carrier including a slideprovided with a blank cavity or seat extending transverselytherethrough, parallel gaging surfaces between which the carrier has itsmotion, and means having a. normal tendency to advance said carrier tothe drilling position.

16. In a machine such as described, the combination with drillingappliances and a movable blank carrier, the latter including a memberprovided with a transverse open ended blank receiving cavity, parallelguides between which said movable member reciprocates, and means havinga normal tendency to advance said carrier to drilling position, of adelivery channel beyond one end of said parallel guides and a blankpusher operating to advance the blank from the delivery channel and seatit within the blank cavity before the latter enters between the parallelguides.

17. In a machine such as described, the combination of the followingelements, towit: a longitudinally reciprocating drill; a blank carriermovable transversely of the axis of the drill and provided with a blankreceiving cavity extending through the carrier and having the side wallperforated for the passage of the drill; opposing guides between whichthe carrier reciprocates to close the ends of the blank cavity; meanshaving a normal tendency to advance said carrier to drilling position; afeed channel to one side of the drill and intersecting the path of thecarrier; and a pusher working in said channel.

18. In a machine such as described, an automatic blank gaging andtransfer mechanism including the following elements, in combination,to-wit: a carrier provided with a blank receiving holder or cavityproportioned to receive a blank of predetermined dimensions and open atopposite ends; guides between which the carrier is moved to close theends of the blank receiving holder or carrier; means having a normaltendency to advance said carrier to drilling position; and a blankfeeding device whose travel terminates at a predetermined distance fromthe blank receiving holder or cavity, substantially as described,whereby the presentation of blanks of abnormal dimensions will arrestthe carrier by the interlocking of the blank with the guides andcarrier.

19. In a drilling machine such as described, the combination withdrilling appa- -ratus, of a blank carrier movable transversely of thedrill, gaging devices, said carrier provided with a receiving cavity orholder in which the blank is carried between the gaging devices with itsends in contact therewith for presentation to the drill, means having anormal tendency to advance said carrier to drilling position, and ablank feeder located beyond the gaging devices and terminating itsfeeding motion at a predetermined distance from the carrier, to properlylocate blanks of normal length within the carrier, substantially asdescribed.

20. In a machine such as described, the combination with drillingdevices, blank feeding devices, and an intermediate blank carrier andholder provided with means having a normal tendency to advance saidcarrier to drilling position, of means for accurately positioning thecarrier while receiving and discharging blanks, the same including anactuating cam, and a holding latch for the carrier.

21. In a machine such as described, the combination of the followingelements, to wit; a blank feeding device including a pusher having ameasured feed movement and an interrupted blank supporting channel; adrilling mechanism; a blank carrier intermediate the drill and pusherprovided with a blank holder which is presented opposite the pusher inthe interval in the blank supporting channel; means having a normaltendency to advance the carrier to drilling position; and a burring toolin position to operate upon the blanks in the channel in rear of thecarrier.

22. In a machine such as described, the combination of the followingelements, towit: a reciprocatory carrier -provided with a transverseblank receiving cavity or holder, and means having a normal tendency toadvance said carrier to drilling position; a blank channel or guideextending transversely of the path of the carrier and interrupted forthe passage of the latter; a pusher operating in said channel on oneside of the carrier; gaging devices located to one side of the channelin position to engage blanks in the carrier; and detaining means for theblanks located in the channel beyond the carrier.

23. In a drilling machine such as described, the combination of thefollowing elements, to-wit: a pair of oppositely'acting alined drills; acarrier intermediate the drills and movable transversely thereof betweenblank gaging devices; a feeder for de- Y livering blanks .to thecarrier; opposing burring tools, and Va channel into whichthe blanks aredelivered from the carrier, said channel extending between the burringtools to present successive blanks thereto.

24. In a machine such as described, the combination of the followingelements, towit: a blank feeding device including a pusher; two alineddrills acting in opposition; a carrier intermediate the drills andpusher and provided with a blank holder; actuating devices forreciprocating the carrier to present its blank holder opposite thepusher and between the drills alternately; and a pair of burring toolsin position to act upon the blanks after they are discharged from thecarrier.

25. In an automatic drilling machine such as described, the combinationof the following elements, to-wit: a longitudinally movable drill; acarrier movable transversely of the drill and provided with a blankholder: a matrix channel extending on opposite sides of the carrier in aline intersecting the path of the latter; a feed galley delivering intothe matrix channel; and a pusher movable longitudinally of the matrixchannel and forming a gate for the feed galley.

FRANK HINMAN PIERPONT..

Witnesses:

HARRY B. Binnen, HERBERT BURRAGE.

